292 lines
7.4 KiB
Python
292 lines
7.4 KiB
Python
# piker: trading gear for hackers
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# Copyright (C) Tyler Goodlet (in stewardship for piker0)
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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Higher level annotation editors.
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"""
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from dataclasses import dataclass, field
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from typing import Optional
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import pyqtgraph as pg
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from ._style import hcolor, _font
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from ._graphics._lines import order_line, LevelLine
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from ..log import get_logger
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log = get_logger(__name__)
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@dataclass
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class ArrowEditor:
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chart: 'ChartPlotWidget' # noqa
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_arrows: field(default_factory=dict)
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def add(
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self,
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uid: str,
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x: float,
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y: float,
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color='default',
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pointing: Optional[str] = None,
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) -> pg.ArrowItem:
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"""Add an arrow graphic to view at given (x, y).
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"""
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angle = {
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'up': 90,
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'down': -90,
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None: 180, # pointing to right (as in an alert)
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}[pointing]
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# scale arrow sizing to dpi-aware font
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size = _font.font.pixelSize() * 0.8
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arrow = pg.ArrowItem(
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angle=angle,
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baseAngle=0,
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headLen=size,
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headWidth=size/2,
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tailLen=None,
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pxMode=True,
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# coloring
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pen=pg.mkPen(hcolor('papas_special')),
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brush=pg.mkBrush(hcolor(color)),
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)
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arrow.setPos(x, y)
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self._arrows[uid] = arrow
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# render to view
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self.chart.plotItem.addItem(arrow)
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return arrow
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def remove(self, arrow) -> bool:
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self.chart.plotItem.removeItem(arrow)
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# global store of order-lines graphics
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# keyed by uuid4 strs - used to sync draw
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# order lines **after** the order is 100%
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# active in emsd
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_order_lines: dict[str, LevelLine] = {}
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@dataclass
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class LineEditor:
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"""The great editor of linez..
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"""
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# TODO: drop this?
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# view: 'ChartView'
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_order_lines: field(default_factory=_order_lines)
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chart: 'ChartPlotWidget' = None # type: ignore # noqa
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_active_staged_line: LevelLine = None
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_stage_line: LevelLine = None
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def stage_line(
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self,
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action: str,
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color: str = 'alert_yellow',
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hl_on_hover: bool = False,
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dotted: bool = False,
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# fields settings
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size: Optional[int] = None,
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) -> LevelLine:
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"""Stage a line at the current chart's cursor position
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and return it.
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"""
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# chart.setCursor(QtCore.Qt.PointingHandCursor)
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chart = self.chart._cursor.active_plot
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cursor = chart._cursor
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y = chart._cursor._datum_xy[1]
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symbol = chart._lc.symbol
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# line = self._stage_line
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# if not line:
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# add a "staged" cursor-tracking line to view
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# and cash it in a a var
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if self._active_staged_line:
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self.unstage_line()
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line = order_line(
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chart,
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level=y,
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level_digits=symbol.digits(),
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size=size,
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size_digits=symbol.lot_digits(),
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# just for the stage line to avoid
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# flickering while moving the cursor
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# around where it might trigger highlight
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# then non-highlight depending on sensitivity
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always_show_labels=True,
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# kwargs
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color=color,
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# don't highlight the "staging" line
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hl_on_hover=hl_on_hover,
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dotted=dotted,
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exec_type='dark' if dotted else 'live',
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action=action,
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show_markers=True,
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# prevent flickering of marker while moving/tracking cursor
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only_show_markers_on_hover=False,
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)
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self._active_staged_line = line
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# hide crosshair y-line and label
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cursor.hide_xhair()
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# add line to cursor trackers
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cursor._trackers.add(line)
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return line
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def unstage_line(self) -> LevelLine:
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"""Inverse of ``.stage_line()``.
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"""
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# chart = self.chart._cursor.active_plot
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# # chart.setCursor(QtCore.Qt.ArrowCursor)
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cursor = self.chart._cursor
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# delete "staged" cursor tracking line from view
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line = self._active_staged_line
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if line:
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cursor._trackers.remove(line)
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line.delete()
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self._active_staged_line = None
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# show the crosshair y line and label
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cursor.show_xhair()
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def create_order_line(
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self,
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uuid: str,
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level: float,
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chart: 'ChartPlotWidget', # noqa
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size: float,
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action: str,
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) -> LevelLine:
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line = self._active_staged_line
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if not line:
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raise RuntimeError("No line is currently staged!?")
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sym = chart._lc.symbol
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line = order_line(
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chart,
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# label fields default values
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level=level,
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level_digits=sym.digits(),
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size=size,
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size_digits=sym.lot_digits(),
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# LevelLine kwargs
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color=line.color,
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dotted=line._dotted,
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show_markers=True,
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only_show_markers_on_hover=True,
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action=action,
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)
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# for now, until submission reponse arrives
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line.hide_labels()
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# register for later lookup/deletion
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self._order_lines[uuid] = line
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return line
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def commit_line(self, uuid: str) -> LevelLine:
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"""Commit a "staged line" to view.
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Submits the line graphic under the cursor as a (new) permanent
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graphic in view.
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"""
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try:
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line = self._order_lines[uuid]
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except KeyError:
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log.warning(f'No line for {uuid} could be found?')
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return
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else:
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assert line.oid == uuid
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line.show_labels()
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# TODO: other flashy things to indicate the order is active
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log.debug(f'Level active for level: {line.value()}')
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return line
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def lines_under_cursor(self):
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"""Get the line(s) under the cursor position.
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"""
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# Delete any hoverable under the cursor
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return self.chart._cursor._hovered
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def remove_line(
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self,
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line: LevelLine = None,
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uuid: str = None,
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) -> LevelLine:
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"""Remove a line by refernce or uuid.
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If no lines or ids are provided remove all lines under the
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cursor position.
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"""
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if line:
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uuid = line.oid
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# try to look up line from our registry
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line = self._order_lines.pop(uuid, None)
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if line:
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# if hovered remove from cursor set
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hovered = self.chart._cursor._hovered
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if line in hovered:
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hovered.remove(line)
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# make sure the xhair doesn't get left off
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# just because we never got a un-hover event
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self.chart._cursor.show_xhair()
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line.delete()
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return line
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